switch station grounding- when is it simply a site not a substation
switch station grounding- when is it simply a site not a substation
(OP)
The recent thread238-222409: Substation Fence Grounding on substation grounding brings up the question of when an installation become a substation vs. a switchyard vs. just some equipment inside a fence.
Obviously if it has a power transformer, it is a substation and needs a full ground grid.
If you put a fence around a high voltage switch, does it become a substation, thus requiring a ground grid and fence grounding? How about a couple of HV motor operated disconnects and a small communications hut? Perhaps the boundry is if there are fault interupting devices?
Obviously if it has a power transformer, it is a substation and needs a full ground grid.
If you put a fence around a high voltage switch, does it become a substation, thus requiring a ground grid and fence grounding? How about a couple of HV motor operated disconnects and a small communications hut? Perhaps the boundry is if there are fault interupting devices?






RE: switch station grounding- when is it simply a site not a substation
With a large transformer, you may have more available fault current, but it would certainly be possible to have high step and/or touch potential in a switching station.
RE: switch station grounding- when is it simply a site not a substation
For non ground source locations, is the need to ground actually driven by the likelyhood of utility workers being present during a fault? Otherwise what is the difference between a switching station, and the nextspan of wire just outside the switching station?
RE: switch station grounding- when is it simply a site not a substation
I think you are putting too much emphasis on the location of the ground source.
RE: switch station grounding- when is it simply a site not a substation